CN102181860A - Method for forming Pt-modified NiAl+Ni3Al thermal barrier adhering layer on surface of nickel-based super alloy - Google Patents
Method for forming Pt-modified NiAl+Ni3Al thermal barrier adhering layer on surface of nickel-based super alloy Download PDFInfo
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- CN102181860A CN102181860A CN 201110072757 CN201110072757A CN102181860A CN 102181860 A CN102181860 A CN 102181860A CN 201110072757 CN201110072757 CN 201110072757 CN 201110072757 A CN201110072757 A CN 201110072757A CN 102181860 A CN102181860 A CN 102181860A
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Abstract
The invention relates to a method for forming a Pt-modified Beta-NiAl+Gamma'-Ni3Al thermal barrier coating adhering layer on the surface of nickel-based super alloy (c). Specially speaking, the surface (a) of a coating is a Pt+Beta-NiAl phase, and the inner part (b) of the coating is a Pt-Gamma-Ni+Gamma'-Ni3Al phase Due to the double-phase structure, the problem of martensite phase transformation in the traditional thermal barrier coating adhering layer is solved as the difference between the coating and the base aluminum is larger, and the aluminum diffuses rapidly, the oxidation resistance of the coating is guaranteed and simultaneously, the adhering property of the coating and the base is combined, and compared with the traditional adhering-layer material, the adhering layer has superior advantages. In the invention, the Pt+Beta-NiAl+Gamma'-Ni3Al coating is formed in a powder embedding and aluminizing way. The specific implementation process is as follows: plating a layer of Pt on the super alloy base, then heating and diffusing the super alloy base, and finally conducting powder embedding and aluminizing on the Pt-plated base diffused uniformly, thus obtaining the coating with the structure and the phase by aluminizing control process.
Description
Technical field
The present invention relates to the NiAl+Ni that a kind of nickel base superalloy surface forms the Pt modification
3The method of Al heat barrier coating bonding layer belongs to the coating for metal surfaces technical field.
Background technology
Modern aero gas turbine engine high thrust, high-level efficiency, low oil consumption and long-life development trend improve constantly the turbine engine inlet temperature.Though the continuous development of superalloy is greatly improved its performance, its lifting amplitude can not satisfy the needs that turbine engine uses far away.Therefore, seek new method of cooling and prepare high temperature resistant and oxidation resistant thermal barrier coating, thereby the temperature that reduces the superalloy matrix surface has just become a kind of very necessary and otherwise effective technique with the oxidation that prevents matrix at high-temperature alloy surface.
Thermal barrier coating generally is made up of the tack coat two layers of material of external ceramic layer and interior metal base.Generally, ceramic layer is Y
2O
3(7 ~ 8 wt.%) stable ZrO
2Be prepared in the surface of metal bonding coating by the method for air plasma spraying (Air plasma spraying) or electro beam physics vapour deposition (Electron beam-physical vapor deposition).Ceramic layer material has lower thermal conductivity, and its inside exists many rooms and slit simultaneously, therefore has very big oxygen spread coefficient.Particularly by the ceramic layer of electro beam physics vapour deposition method preparation, its structure is a columnar crystal structure, has bigger space between each column crystal, and seeing through of oxygen is very capable.Based on above reason, the tack coat that is positioned at the ceramic layer bottom must have extraordinary high temperature oxidation resistance, could guarantee that the superalloy matrix is not oxidized, thereby increases its work-ing life.
The antioxidation mechanism of tack coat is exactly by TGO (the Thermal grown oxide) layer in the densification of surface generation one deck, stops the further diffusion in matrix of oxygen, thereby plays the effect of protection matrix.Simultaneously, the inefficacy of most thermal barrier coating all causes owing to ceramic layer and TGO layer or tack coat and TGO layer generation unsticking, therefore can generate one deck compact oxide, whether suitable can simultaneously keep good adhesive property with matrix, be to weigh a kind of bonding layer material two The key factor very.
Traditional heat barrier coating bonding layer material mainly is MCrAlY(M=Ni, Cr or Ni+Cr) or the NiAl alloy of Pt modification.These two kinds of coatings can generate fine and close Al because surfaces of aluminum content is very high under the environment of aerobic
2O
3Layer stops oxygen further to internal divergence, therefore has good antioxidant property.But because the aluminium content in itself and the nickel base superalloy differs too big, therefore the aluminium in the coating is very fast to inner rate of diffusion, cause coating to be easy to martensitic transformation take place, and finally cause coming off of ceramic layer, thermal barrier coating was lost efficacy owing to internal stress is excessive owing to the disappearance of aluminium content.
Summary of the invention
The present invention is intended to prepare higher and the heat barrier coating bonding layer that aluminium content is lower of a kind of Pt content, thereby it is not excessive to solve in the traditional thermal barrier tack coat in the aluminium content and matrix al content difference, causes tack coat to produce the problem of martensitic transformation owing to aluminium rapid diffusion in matrix.
The present invention is by at nickel base superalloy surface plating Pt, adopts the pack aluminizing method then, goes out a kind of NiAl+Ni of Pt modification in the nickel base superalloy surface preparation
3The Al coating.Pt+ β-NiAl is distributed in the surface of coating mutually, and coating aluminium content lowers to inside gradually from the surface,
Finally form with Pt+ γ-Ni+ γ '-Ni in the inside of coating
3Al is main phase.This coating, because its aluminium content reduces from outside to inside gradually, so the rate of diffusion of its inner aluminium will be significantly smaller than traditional bonding layer material, thereby guaranteed the content of coatingsurface aluminium, reduced because phase transformation produces the possibility of stress, increased the life-span of thermal barrier coating system.
The present invention forms the NiAl+Ni of Pt modification at the nickel base superalloy matrix surface
3The method of Al thermal boundary tack coat is characterized in that having following process and step:
(a) plate the Pt that a layer thickness is 5 ~ 12 μ m on the nickel base superalloy surface by electric plating method;
(b) will plate Pt superalloy matrix heat treated 1 ~ 3h under 900 ~ 1200 ℃ temperature;
(c) put into the corundum crucible that mixed uniformly powder penetrating agent is housed with above-mentioned through the plating Pt of heat treated superalloy matrix.Adopt the method for powder pack cementation, the superalloy matrix is embedded in the powder penetrating agent, be heated to 800 ~ 1200 ℃, insulation 2 ~ 6h.And finally generate Pt+ β-NiAl+ γ '-Ni at the superalloy matrix surface
3The Al coating;
The composition of described powder penetrating agent and quality percentage composition are: 4 ~ 10%Cr-Al or Ni-Al, 2 ~ 4%NH
4Cl and 86 ~ 94%Al
2O
3
Pt+ β of the present invention-NiAl+ γ '-Ni
3The Al coatingsurface is β-NiAl phase, can generate fine and close Al in oxidative environment
2O
3Oxide film can effectively protect matrix not oxidized.The tack coat bottom that links to each other with matrix simultaneously is γ '-Ni
3Al+ γ-Ni phase has guaranteed the adhesive property with the superalloy matrix.Compare with traditional bonding layer material, this coating has overcome because of the too fast problem that causes thermal barrier coating to lose efficacy of Al dissipation, and the thermal barrier coating life-span is increased greatly.And compare with traditional coating production, this invention working method is simple, with low cost.
The mechanism of relevant thermal boundary tack coat of the present invention:
(1) tack coat constantly reduces from the surface to inner aluminium content, and the concentration gradient of tack coat and superalloy basal body interface place aluminium is very little.Surface Pt content very high (25-28wt.%), Pt is present in the coating with the form of substitutional solid solution, and antioxidant property that improves coating and the adhesive property that strengthens tack coat and ceramic layer are played useful effect.
(2) tack coat top layer aluminium content very high (17-21wt.%) has good antioxidant property; And unlined aluminium content lower (8-12wt.%), the layer tissue phase structure is mutually identical with the composition of superalloy matrix in the coating, and therefore the adhesive property with matrix is better than traditional bonding layer material.
(3) tack coat is in high-temperature oxidation environment, and surfaces of aluminum is slow to the speed of internal divergence, and the possibility that martensitic transformation occurs reduces greatly.
Characteristics of the present invention and advantage:
Compare with traditional heat barrier coating bonding layer,, be in particular in no matter the coating of the present invention's preparation is all to have bigger advantage in performance or on economic factors:
1. the coating antioxidant property is good, Stability Analysis of Structures.Use the Pt+ β-NiAl+ γ '-Ni of this invention preparation
3Its surface of Al coating is β-NiAl phase, has good resistance of oxidation.Simultaneously the aluminum concentration gradient is less between coating and the matrix, and the coatingsurface aluminium element is slower to the speed of matrix diffusion, so coating is inner, and coating structure is stable because the stress that phase transformation produces is less, the increase in work-ing life.
2. good with the bond matrix performance.Use the Pt+ β-NiAl+ γ '-Ni of this invention preparation
3Al coating bottom is γ '-Ni
3Al+ γ-Ni phase, mutually identical with superalloy matrix composition, therefore have the advantages of good caking property energy.
3. simple to operate, with low cost.Prepare tack coat with methods such as using spraying and compare, it is simple, easy to operate, with low cost that this invention adopts the method for pack aluminizing to prepare tack coat equipment.Especially for the preparation of the top coat of porose part, have more clear superiority.
Description of drawings
Fig. 1 has Pt+ β-NiAl+ γ '-Ni among the present invention
3The thermal barrier coating structural representation of Al tack coat.Wherein: a-ceramic layer, b-TGO, c-Pt+ β-NiAl+ γ '-Ni
3The Al tack coat, d-superalloy matrix.
Embodiment
Embodiment 1 chooses superalloy DZ417G as matrix, and its line is cut into the sheet of 15mm * 10mm * 3mm, uses 120# respectively, 400#, 800# and 1200# silicon carbide paper are smooth with its surface finish, put it into then in the beaker that acetone is housed, and use ultrasonic cleaning 20 minutes.After sample taken out from beaker, use clear water that the acetone rinsing of sample surfaces is clean, with the dehydrated alcohol flushing, with blower it is dried up at last again, stand-by.
Thickness is the Pt layer of 5 μ m on the sample surfaces that has cleaned up is electroplated, and will electroplate good matrix then at 1050 ℃ of heat treated 2h.
The penetration enhancer that mixes is placed corundum crucible, and the penetration enhancer composition that the powder aluminising is used is 6wt.%Cr-Al, 2wt.%NH
4The Al of Cl and 92wt.%
2O
3The heat treated plating of above-mentioned process Pt superalloy matrix is embedded in the penetration enhancer, and assurance superalloy matrix is in the central authorities of crucible substantially and is buried by powder penetrating agent fully.Use high-temperature flame-proof mud and high-temp glue crucible to be sealed tight.Use blower that refractory mortar is dried up then.The crucible of good seal is put in the resistance furnace, fed protective atmosphere, be heated 1100 ℃, insulation 3h.Powered-down with sample and crucible furnace cooling, thereby obtains Pt+ β-NiAl+ γ '-Ni then
3The Al coating.
Embodiment 2 plates the Pt that thickness is 7 μ m at the superalloy matrix surface that cleans up, then with it at 1100 ℃ of following heat treated 3h.The penetration enhancer composition that the powder aluminising is used is: 8wt.%Ni-Al, 2wt.%NH
4The Al of Cl and 90 wt.%
2O
3, other technology is identical with above-mentioned technology.The NiAl+Ni of Pt modification among Fig. 1
3Al base heat barrier coating bonding layer (c) is positioned at the middle part of thermal barrier coating system, and its top is TGO(b) layer, TGO top is ceramic layer (a), the tack coat bottom is superalloy matrix (d).
Claims (1)
1. nickel base superalloy surface forms the NiAl+Ni of Pt modification
3The method of Al thermal boundary tack coat is characterized in that having following process and step:
(a) plate the Pt that a layer thickness is 5 ~ 12 μ m on the nickel base superalloy surface by electric plating method;
(b) will plate Pt superalloy matrix heat treated 1 ~ 3h under 900 ~ 1200 ℃ temperature;
(c) put into the corundum crucible that mixed uniformly powder penetrating agent is housed with above-mentioned through the plating Pt of heat treated superalloy matrix;
Adopt the method for powder pack cementation, the superalloy matrix is embedded in the powder penetrating agent, be heated to 800 ~ 1200 ℃, insulation 2 ~ 6h; And finally generate Pt+ β-NiAl+ γ '-Ni at the superalloy matrix surface
3The Al coating;
The composition of described powder penetrating agent and quality percentage composition are: 4 ~ 10%Cr-Al or Ni-Al, 2 ~ 4%NH
4Cl and 86 ~ 94%Al
2O
3
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424948A (en) * | 2011-10-24 | 2012-04-25 | 北京航空航天大学 | Method of preparing CoAlNi coating on Ni-based high-temperature alloy through pack cementation |
| CN102615876A (en) * | 2012-03-23 | 2012-08-01 | 上海大学 | Beta-NiAl thermal barrier coating with modified Pt+Si and method for preparing beta-NiAl thermal barrier coating |
| CN102888583A (en) * | 2012-10-29 | 2013-01-23 | 中国科学院上海硅酸盐研究所 | CoNiCrAlY coating and production process and application thereof |
| CN103590002A (en) * | 2012-08-17 | 2014-02-19 | 中国科学院金属研究所 | Preparation method for Al-Cr coating on nickel-based superalloy |
| RU2507310C1 (en) * | 2012-08-09 | 2014-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тольяттинский государственный университет" | FORMATION METHOD OF HEAT-RESISTANT COATINGS ON BASIS OF NICKEL ALUMINIDE (NiAl) |
| CN105350042A (en) * | 2015-10-28 | 2016-02-24 | 上海大学 | Preparing method for beta-(Ni,Pt)Al single-phase alloy coated to surface of high temperature alloy |
| CN105714339A (en) * | 2016-04-01 | 2016-06-29 | 上海交通大学 | Zr doped Ni-Al adhesive layer material with Ni-Zr diffusion obstacle layer and preparation method thereof |
| CN105734500A (en) * | 2016-04-21 | 2016-07-06 | 西北有色金属研究院 | High temperature oxidation-resistant thermal barrier coating layer with composite structure and preparation method thereof |
| CN106283135A (en) * | 2015-05-25 | 2017-01-04 | 中国科学院金属研究所 | A kind of method introducing rare metal Hf element in the coating |
| CN108715990A (en) * | 2018-06-14 | 2018-10-30 | 沈阳梅特科航空科技有限公司 | A kind of β-NiAl coatings and preparation method thereof of Al-Si slurries and Si modification |
| CN110172703A (en) * | 2019-05-27 | 2019-08-27 | 昆明理工大学 | A kind of method in high temperature coating service life on raising nickel-base alloy |
| CN110573658A (en) * | 2017-03-30 | 2019-12-13 | 赛峰集团 | turbine component made of superalloy and method for manufacturing same |
| CN111108264A (en) * | 2017-09-21 | 2020-05-05 | 赛峰集团 | Turbine component made of a rhenium and/or ruthenium containing superalloy and related manufacturing method |
| CN113512702A (en) * | 2021-07-14 | 2021-10-19 | 北航（四川）西部国际创新港科技有限公司 | Single-phase beta-NiAl bonding layer and preparation method thereof |
| CN114032412A (en) * | 2021-11-08 | 2022-02-11 | 昆明理工大学 | 1400 ℃ high-strength creep-resistant Pt-based high-temperature alloy |
| CN114214685A (en) * | 2021-09-22 | 2022-03-22 | 湘潭大学 | High-temperature protective coating and preparation method and application thereof |
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Cited By (20)
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|---|---|---|---|---|
| CN102424948A (en) * | 2011-10-24 | 2012-04-25 | 北京航空航天大学 | Method of preparing CoAlNi coating on Ni-based high-temperature alloy through pack cementation |
| CN102615876A (en) * | 2012-03-23 | 2012-08-01 | 上海大学 | Beta-NiAl thermal barrier coating with modified Pt+Si and method for preparing beta-NiAl thermal barrier coating |
| RU2507310C1 (en) * | 2012-08-09 | 2014-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тольяттинский государственный университет" | FORMATION METHOD OF HEAT-RESISTANT COATINGS ON BASIS OF NICKEL ALUMINIDE (NiAl) |
| CN103590002A (en) * | 2012-08-17 | 2014-02-19 | 中国科学院金属研究所 | Preparation method for Al-Cr coating on nickel-based superalloy |
| CN102888583A (en) * | 2012-10-29 | 2013-01-23 | 中国科学院上海硅酸盐研究所 | CoNiCrAlY coating and production process and application thereof |
| CN102888583B (en) * | 2012-10-29 | 2014-09-10 | 中国科学院上海硅酸盐研究所 | CoNiCrAlY coating and production process and application thereof |
| CN106283135A (en) * | 2015-05-25 | 2017-01-04 | 中国科学院金属研究所 | A kind of method introducing rare metal Hf element in the coating |
| CN105350042B (en) * | 2015-10-28 | 2018-03-06 | 上海大学 | β coated on high-temperature alloy surface（Ni, Pt）The preparation method of Al single-phase alloy layers |
| CN105350042A (en) * | 2015-10-28 | 2016-02-24 | 上海大学 | Preparing method for beta-(Ni,Pt)Al single-phase alloy coated to surface of high temperature alloy |
| CN105714339A (en) * | 2016-04-01 | 2016-06-29 | 上海交通大学 | Zr doped Ni-Al adhesive layer material with Ni-Zr diffusion obstacle layer and preparation method thereof |
| CN105734500A (en) * | 2016-04-21 | 2016-07-06 | 西北有色金属研究院 | High temperature oxidation-resistant thermal barrier coating layer with composite structure and preparation method thereof |
| CN105734500B (en) * | 2016-04-21 | 2018-08-03 | 西北有色金属研究院 | A kind of resistance to high temperature oxidation thermal barrier coating and preparation method thereof with composite construction |
| CN110573658A (en) * | 2017-03-30 | 2019-12-13 | 赛峰集团 | turbine component made of superalloy and method for manufacturing same |
| CN111108264A (en) * | 2017-09-21 | 2020-05-05 | 赛峰集团 | Turbine component made of a rhenium and/or ruthenium containing superalloy and related manufacturing method |
| CN108715990A (en) * | 2018-06-14 | 2018-10-30 | 沈阳梅特科航空科技有限公司 | A kind of β-NiAl coatings and preparation method thereof of Al-Si slurries and Si modification |
| CN110172703A (en) * | 2019-05-27 | 2019-08-27 | 昆明理工大学 | A kind of method in high temperature coating service life on raising nickel-base alloy |
| CN113512702A (en) * | 2021-07-14 | 2021-10-19 | 北航（四川）西部国际创新港科技有限公司 | Single-phase beta-NiAl bonding layer and preparation method thereof |
| CN113512702B (en) * | 2021-07-14 | 2023-02-28 | 北航（四川）西部国际创新港科技有限公司 | Single-phase beta-NiAl bonding layer and preparation method thereof |
| CN114214685A (en) * | 2021-09-22 | 2022-03-22 | 湘潭大学 | High-temperature protective coating and preparation method and application thereof |
| CN114032412A (en) * | 2021-11-08 | 2022-02-11 | 昆明理工大学 | 1400 ℃ high-strength creep-resistant Pt-based high-temperature alloy |
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Application publication date: 20110914 |